Sheet-metal piling



June 29 1926.

' J. LINDENLAUF SHEET METAL FILING Filed Jan. 15, 1926 INVENTOR PatentedJune 29, v1926.

UNITED STATES 1,590,302 PATENT. OFFICE.

JOSEPH LINDENLAUF, OF PITTSBT IBGH, PENNSYLVANIA, ASSIGNOR OF THREE-EIGHTHS '10 HERMAN STRATMAN AND TWO-EIGHTHS T0 HARVEY M. ARONSON, BOTHOF FITTSBURGH, PENNSYLVANIA.

SHEET-METAL rILme. 1

Application filed January 15, 1926; Serial No. 81,396.

The invention relates to rolled sheet metal piling, and particularly tothe box type, in which each pile is made up of two oppositely turnedsections or shapes of U-form in cross section, riveted together at theirmeeting edges, which are turned laterally for this purpose. Theinvention has for its principal objects the provision of. an improvedpile of the type specified; (1) in which all of the parts making up thepile may be rolled without any difliculty by ordinary methods; (2) inwhich an accurately fitting interlock is insured at the meeting edges ofthe piles; (3) which is adapted to be rolled is a similar view showing aslight modi cation. And Fig. 3 is an end view of the interlocking shape.

Referring to the drawings, A, A, A are three piles all similar, arrangedin interlocking. position. Each pile consists of a pair of opposingU-shapes 1, 1 having their opposing flanges 2, 2 turned outward, and apair of interlockingshapes 3, 3, one at 1 each side ot the pile.

The shapes 3, 3 are similar, and are rolled members each comprising aflange 4 (Fig.

- 3) and an interlock consisting of the tongue 5 and the hook 6.. Theinterlock itself is 7 that shown and described in my Patent No.

1,543,676 of June 30, 1925; The flanges f the shapes 3 3 fit between theopposing flanges 2, 2-0% the shapes 1, 1, and the parts are rigidlysecured together by the rivets 7 7 one line only of which is shown, butit will be understood that by providing longer flanges to give thenecessary space, more lines of rivets may be-used, if desired. The

- pile is symmetrical with respect to its axis The neutral axis of thepile lies approximately upon the center line 0:, a: of the wall, in theFig. 1 construction, being only slightly below such line due to the factthat the hooks 6 6 which lie below the neutral axis have. their. centersof" gravity slightly .any practical requirement.

further from the center line as, wthan the centers of gravity of thetongues 5, 5. This is practically negligible, but is corrected in theFig. 2 construction, in which the shapes 3, 3 at the two sides of thepile are reversed in position, the hook 6 lying below the center lineit, w on one. side'ot the pile, and above it on the other side.Otherwise, the arrangement of Fig. 2 is identical with that of Fig. 11

The great advantage of the pile just described is the ease with whichthe diflerent parts may be rolled in the mill and put together in theshop. The interlocking pieces are narrow and light members easily rolledand formed in the'mill and easily handled in the shop, while the mainU-shapes are entirely devoid of any parts requiring spe-- cial care inrolling or handling. Variations in the widths of the main shapes and inthe widths of the connecting web of the interlocking pieces are easilytaken care of .in locating the rivet lines in the shop and in no wayaflect the accuracy of the interlock,

while the distancebetween the centers of the latter may easily be madevery accurate.

A further important advantage is the fact that by spreading the rollsthe thickness of the main U-shapes may be gauged to suit As theinterlocking pieces are rolled separate these are not afiected thereby,whereas, if they Were an integral part of the main shape, spreadin therolls would become impractical I hat I claim is:

1. A pile comprising a pair of opposin rolled U-shapes with out-turnedflanges, an I an interlock at each side of the pile comprising a rolledshape with a flange at its inner side secured between said out-turnedflanges and an interlocking device atits outer side. 2. A pilecomprising a pair of. opposing rolled U-shapes with out-turned flanges,and an interlock at each side of the pile comprising 9. rolled shapewith-a flange at its inner side secured between said out-turned flangesand an interlocking device at its outer side, the said interlocks at thetwo'side's of the pile being counterparts.

.3. A 1le comprising a pair. of opposing rolledv shapes with out-turnedflanges, and an interlock at each side of the pile comprising a rolledshape with a flange at its inner side secured between said out-turned iflanges and a tongue and hook interlocking device at its outer sidelyingin part on one device at its outer side. side of the neutral axis of thepile and in 10 4. A pile comprising a pair of opposing part on the otherside of said axis.

rolled U-shapes with out-turned flanges, and In testimony whereof, Ihave hereunto 5 an interlock at each side of the pile comsubscribed myname this 6th day of J anuprising a rolled shape with a flange at itsary, 1926. inner side secured between said out-turned flanges and atongue'and hook interlocking JOSEPH LINDENLAUF.

